sorry what do you meen? i have used 10mm copper and connected to 10mm copper, the entire system is this size apart form around the tanks/ boiler where it is 22mm/15mm
i have recently addaed a radiator to my heating system in the conservatory. i found the pipework form the nearest radiator in the wall and joined in from here. the piepwork is 10mm minibore. the radiator supply pipe is very hot and tha radiator heats up very slowly and not much, but the other...